Technical specifications and requirements for SAE J1939 cables

Technical specifications and requirements for SAE J1939 cables

As the core component of communication for heavy vehicles and industrial equipment, J1939 cable strictly follows the SAE J1939 protocol standard and is a key physical layer carrier to ensure stable operation of the onboard network. Its technical specifications are based on CAN bus technology, with a transmission rate of up to 250Kbps, supporting real-time data exchange between electronic control units (ECUs) in the controller area network.

In terms of electrical characteristics, J1939 cables need to meet the 120 ohm terminal resistance matching requirements to eliminate signal reflection interference and ensure data transmission integrity. Shielding layer design is an important technical indicator that requires effective grounding to reduce the impact of electromagnetic interference (EMI) on communication, especially suitable for high electromagnetic environments such as engine compartments.

The cable must pass SAE J1939 CAN bus certification, which covers comprehensive testing of electrical performance, environmental adaptability, etc., to ensure that the product complies with global heavy-duty vehicle communication standards. The certification process includes signal transmission stability, temperature resistance range, and mechanical strength verification, providing reliable assurance for seamless communication between devices.